CP Welcomer was an add-in for CuP. It was just following Asychronee's "Getting Started with Add-Ins" but changed its text from "Hello World!" to "Welcome to Club Penguin!". It was only available for less than 1 day. It is most likely that the sole purpose of this add-in was opening a Message Box saying "Welcome to Club Penguin!" upon entering Club Penguin in CuP. CPHax2 confirmed that this add-in don't work. The icon was made from Carl499.[1].
The add-in never worked, which was the reason for its deletion. It got deleted from PanV.